Gasless wire is proper pooooooo!! simple as that , use a 0.8 or 0.6 if your rollers will feed it through nice and smooth without it getting caught up

Use a co2/argon mix for best results ,

Another thing people think is that they can do a perfect weld run of say 6 inches regardless of the thickness of steel theyre welding just by turning the welder down ., 3mm and above yes but anything thinner your better off doing short bursts , litterly one spot at a time , the end result will be a lot neater and will produce less distortion to boot .

to set up your welding current get a piece of scrap metal the same thickness of that to be welded , point the torch tip at the metal ( make sure its got the earth lead on lol , ) press the trigger and listen !!!!!!!!!!!! the only way to discribe it is that the weld should sound like a cat puring , if it pops and bangs and you can feel the wire digging into the weld pool then turn the wire feed down , if its sizzling with the occasional crack then the wire feed needs to be turned up as theirs not enough wire going in and its burning back towards the tip ( befor someone corrects me this is/can be ,l a form of weld transfer called dip tranfer but its a fine line and will generate far to much heat for your body work appication .

Sip arnt a bad make to be honest but look on the back and it'll say something about rated amps per duty cycle , itll probably be something like 120 amp at 25% d/cyc and 80 amp at 80% d/cyc

this is just for your information realy and it means that if you think you can weld 5mm plate for 3 hours solid on max power then your gonna melt something .

a decent helmet if your going to be doing a lot ( and i mean daily) is a must but i had for the first 5 years of welding ( as in 8 hours a day ) a standard £15 mask , all be it with a split screen in , Light at the top to sight your work and dark at the bottom to stop that nasty arc eye .

last thing is that yes , when you start to weld the heat generated at the weld pool is hot enough to burn away the likes of paint and general muck , but its not something to get into the habit of doing , clean all areas and surfaces to be welded of paint , underseal , rusty metal etc , atleast 1/2" away from the edge ,

to recap , clean the parent metals to be welded , tack into place and fully weld with just short bursts , set the welding current and wire feed ( a puringpussy cat )

Hope this is of use ????????????